But some scientists say drug metabolism studies with only 10 or 15 subjects are too small to pick up sex differences.
"I can't explain" why the two animals died, she said, "but if you're doing studies with only four or five animals, it's not appropriate to draw conclusions like 'one out of five will die.' " Ecstasy, also known as MDMA, is a methamphetamine whose users describe an overwhelming sense of peace and friendship for others, as well as the energy to dance for hours.
The reason, said Ilya R. Segal, a professor at Stanford who trained as a theoretician at M.I.T., stems from a long-running schism between two stereotypical schools of empirical, or applied, economics: one that favors data-intensive studies with only cursory theoretical models and another that insists on rigorous theoretical underpinnings for all assumptions.
Studies with only male subjects appear to show consistent antioxidant effects in terms of reduced levels of oxidized pyrimidines.
Studies included primarily ICU survivors (69 %, n = 54 studies), healthcare providers (29 %, n = 23 studies) with only one study specifically examining caregivers and patients.
Limited evidence on the clinical outcome of PEEK cages is found in the literature other than noncomparative cohort studies with only a few randomized controlled trials.
The general principle of the model is that "complex, large data-volume examinations with multiple images take a longer time to report, and consume more mental effort than studies with only a handful of images, such as a CXR.
Most knowledge on the occurrence of seizures in the emergency department (ED) setting is based on small studies, with only two samples of more than 1,000 patients published, these having limited generalizability [12, 20].
The diagnostic performance of multidetector row CT to detect coronary artery stenosis has been evaluated in numerous single-center studies, with only limited data from large cohorts with low-to-intermediate likelihood of coronary disease and in multicenter trials.
The microcavity electrode (about 10−3 mm3) allows studies with only a few micrograms of MnO2 powder in order to display its intrinsic electrochemical behavior and to improve the understanding of the role of the different components in the composite electrode performance.
But there was one caveat to the studies: With only about 300 hotels in the U.S. that are LEED-certified, academics have limited data on which to base their studies, Verma said.
